ADF7012

Rev. 0 | Page 2 of 28

TABLE OF CONTENTS

Specifications..................................................................................... 3

Timing Characteristics..................................................................... 5

Absolute Maximum Ratings............................................................ 6

Transistor Count........................................................................... 6

ESD Caution.................................................................................. 6

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 8

315 MHz ........................................................................................ 8

433 MHz ........................................................................................ 9

868 MHz ...................................................................................... 10

915 MHz ...................................................................................... 11

Circuit Description......................................................................... 12

PLL Operation ............................................................................ 12

Crystal Oscillator........................................................................ 12

Crystal Compensation Register................................................ 12

Clock Out Circuit ....................................................................... 12

Loop Filter ................................................................................... 13

Voltage-Controlled Oscillator (VCO) ..................................... 13

Voltage Regulators...................................................................... 13

FSK Modulation.......................................................................... 13

GFSK Modulation ...................................................................... 14

Power Amplifier.......................................................................... 14

GOOK Modulation .................................................................... 15

Output Divider ........................................................................... 16

MUXOUT Modes....................................................................... 16

Theory of Operation ...................................................................... 17

Choosing the External Inductor Value.................................... 17

Choosing the Crystal/PFD Value............................................. 17

Tips on Designing the Loop Filter ........................................... 17

PA Matching................................................................................ 18

Transmit Protocol and Coding Considerations ..................... 18

Application Examples .................................................................... 19

315 MHz Operation ................................................................... 20

433 MHz Operation ................................................................... 21

868 MHz Operation ................................................................... 22

915 MHz Operation ................................................................... 23

Register Descriptions ..................................................................... 24

R Register..................................................................................... 24

N-Counter Latch ........................................................................ 25

Modulation Register .................................................................. 26

Function Register ....................................................................... 27

Outline Dimensions ....................................................................... 28

Ordering Guide .......................................................................... 28

REVISION HISTORY

10/04—Revision 0: Initial Version